Sash-fastener



(Model.)

J. H. LACERTE. sAsH PASTBNER.

No. 279,771. Patented June 19,1883.

NA PETERS, PhumLixhogmpmr, wnh nnnnnn 4(L lIo UNITED 'STATES PATENT OFFICE.

J EAN HILARION LAOER'IE, OF THE PARISH OF ST. BARNAB, QUEBEC, CAN- ADA, ASSIGNOR TO ISAIE LAOER'IE, OF WAUSAU, WISCONSIN.

' sAsH-FAsi-ENER.

Y SPECIFICATION forming part of Letters Patent No. 279,771,7dated June 19, 1883.

Application filed December 2l, 1882. (Model.)

To all whom it may concern.:

Be it known that I, JEAN HILARIoN LA cERTE, of the parish of St. Barnab, in the county of St. Maurice, and in the Province of Quebec, Canada, have invented certain new and useful vImprovements in Sash-Fasteners 5 and I dohereby declare that the following is a full, clear, and exact description thereof.

My invention relates to window-sash locks, and will be fully described hereinafter.

In the drawings, Figure 1 is a perspective view of my device. Fig. 2 is a section of the device, showing the parts locked together as in Fig. 1, and Fig. 3 is a section taken on theopposite side, and showing the parts unlocked, both taken on the line .fr x of Fig. 1; and Fig. 4 is a rear view of the latch and its shell.

A is a portion of the upper sash-frame, and A a portion of the lower saslrframe.

'B is the shell of the latch, and C the shell of the catch.

The latch D has trunnions d d', the trunnion d fitting loosely in a loop, b, which is cast with the shell B, and the trunnion d fitting in a loop formed by an upward projection on the bottom of the shell and a downward projection from its top. The latch D has an arm,

D', that projects from its rear to one side, where its end enters a slot, f, in a dog, F, the latter working on a pivot, f2 in the bottom of shell B, and the slot f in dog- F has' an offset, f', for engagement with the outer end of the arm D' of latch D, to hold the latch D, after it has been thrust up into the position shown in Fig.

3 of the drawings, by a slide, H, as will be described farther on-that is, out of position to lengage with the catch a on shell C-and when the latch D is in this position the dog F falls forwardinto the position also shown in Fig. 3, with its point g projecting over the shell C, and when the parts are in this position the lower sash, A', can be raised; but as it rises the shell C, striking the point g of the dog F, will lift it and cause the offset f' ofthe slot f to release the arm d' of latch D'and permit the latter to be thrown forward against the face of shell C by its spring G, after the shell C has been lifted too far for the latch to engage with catch a, and then, as the sash A' rises higher, the latch D is thrown forward by its spring until its curved head projects slightly beneath the beveled edge of the sash-frame A', and the dog F has been wedged up into the position shown in Fig. 2 by the action of arm D in slot f, so that when Vthe sash A' is again lowered the curved head of latch D will ride upon the face -of the frameof sash A' until its upper `frame that carries shell C gets low enough for the latch D to spring into engagement with catch a and lock the sashes together.

H is a slide, which, when not in use, is held away from the head of latch D by a spring, h, but which can be thrust forward against the force of its spring whenever it is desired to throw the head of latch D out of engagement with catch a.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, in a sash-lock, of a spring-latch having an arm, D', with a dog, slotted as described, and adapted to secure the latch when unlocked until the raising of the lower window-sash, as set forth. p

2. The combination of the dog, having slot fand offset f', with the spring-latch D, having arm D', as set forth.

3. The spring-slide H, in combination with the pivoted latch D and beveled catch a on the case A', as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, on this 11th day of December, 1882, in the presence of two witnesses.

JEAN HILARION LAOERTE.

Witnesses:

Jos. En. GnNEsT, BINoNr LAssALLE. 

